The Optics and Photonics Days (OPD) 2024 will be held from 28th May to 30th May 2024 at Scandic Grand Marina & Marina Congress Center, Helsinki, Finland. It is an annual central event in the area of Optics and Photonics in Finland. This event offers a unique opportunity to learn from interesting presentations from the Academy and Industry programs running in parallel, network with companies, students, and researchers in the field of photonics and optics, but also to explore products and services at the OPD Exhibition that is held during the conference.